@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Rajdhani:wght@300;400;500;600;700&family=Share+Tech+Mono&display=swap');

/* ===== ROOT VARIABLES ===== */
:root {
  color-scheme: dark;
  --bg:          #020611;
  --bg-deep:     #01020a;
  --bg-card:     rgba(8, 18, 38, 0.72);
  --cyan:        #42eaff;
  --cyan-soft:   rgba(66, 234, 255, 0.68);
  --cyan-dim:    rgba(66, 234, 255, 0.18);
  --cyan-glow:   rgba(66, 234, 255, 0.45);
  --magenta:     #ff46d7;
  --magenta-soft:rgba(255, 70, 215, 0.62);
  --magenta-dim: rgba(255, 70, 215, 0.18);
  --gold:        #ffd166;
  --glass:       rgba(10, 23, 43, 0.48);
  --glass-strong:rgba(21, 34, 58, 0.82);
  --line:        rgba(110, 232, 255, 0.32);
  --text:        #eef8ff;
  --text-muted:  rgba(224, 245, 255, 0.62);
  --text-dim:    rgba(180, 220, 240, 0.42);
  --panel-radius:10px;
  --ui-font:     'Rajdhani', ui-sans-serif, system-ui, sans-serif;
  --display-font:'Orbitron', monospace;
  --mono-font:   'Share Tech Mono', 'SFMono-Regular', Consolas, monospace;
  --neon-cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28' viewBox='0 0 28 28'%3E%3Cdefs%3E%3Cfilter id='g' x='-90%25' y='-90%25' width='280%25' height='280%25'%3E%3CfeGaussianBlur stdDeviation='1.8' result='b'/%3E%3CfeMerge%3E%3CfeMergeNode in='b'/%3E%3CfeMergeNode in='SourceGraphic'/%3E%3C/feMerge%3E%3C/filter%3E%3C/defs%3E%3Cpath d='M7 4L7 20L12 15L16 24' fill='none' stroke='%2342eaff' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round' filter='url(%23g)'/%3E%3Cpath d='M12 15L18 14' fill='none' stroke='%23ff46d7' stroke-width='1.7' stroke-linecap='round' filter='url(%23g)'/%3E%3C/svg%3E") 7 5, auto;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; min-height: 100%;
  overflow-x: hidden; overflow-y: auto;
  background: var(--bg-deep);
  font-family: var(--ui-font);
  cursor: var(--neon-cursor);
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: rgba(66,234,255,0.3) rgba(2,6,17,0.8);
}
a { color: inherit; text-decoration: none; cursor: var(--neon-cursor); }

/* LOADER */
#loader {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: #010209;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-logo {
  font-family: var(--display-font);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700; letter-spacing: 0.18em;
  color: var(--cyan);
  text-shadow: 0 0 30px rgba(66,234,255,0.5), 0 0 60px rgba(66,234,255,0.2);
  animation: logoGlow 1s ease-in-out infinite alternate;
}
.loader-logo em { font-style: normal; color: var(--magenta); }
.loader-bar {
  width: 180px; height: 1px; margin-top: 22px;
  background: rgba(66,234,255,0.1); border-radius: 99px; overflow: hidden;
}
.loader-bar::after {
  content: ''; display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 8px var(--cyan);
  animation: loaderFill 0.7s cubic-bezier(0.4,0,0.2,1) forwards;
}
.loader-status {
  margin-top: 12px;
  font-family: var(--mono-font); font-size: 9px;
  color: rgba(66,234,255,0.45); letter-spacing: 0.18em; text-transform: uppercase;
}
@keyframes logoGlow {
  from { text-shadow: 0 0 20px rgba(66,234,255,0.4); }
  to   { text-shadow: 0 0 40px var(--cyan), 0 0 80px rgba(66,234,255,0.25); }
}
@keyframes loaderFill { to { width: 100%; } }

/* SITE SHELL */
.site-shell {
  position: relative; width: 100vw; height: auto;
  min-height: max(260vh, 2100px); overflow: hidden; isolation: isolate;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(13,58,120,0.52), transparent 38%),
    radial-gradient(ellipse at 12% 10%, rgba(52,207,255,0.14), transparent 22%),
    radial-gradient(ellipse at 88% 60%, rgba(255,48,221,0.12), transparent 28%),
    linear-gradient(180deg, #030714 0%, #030714 43%, #020916 100%);
}
.site-shell::before {
  content: ''; position: fixed; z-index: 13; top: 0; left: 0; right: 0; height: 160px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(1,4,12,0.98), rgba(2,7,18,0.82) 50%, rgba(2,7,18,0));
}

/* CANVASES */
#neural-scene  { position: fixed; inset: 0; z-index: 1; width: 100%; height: 100%; }
#stream-scene  { position: fixed; inset: 0; z-index: 6; width: 100%; height: 100%; pointer-events: none; mix-blend-mode: screen; }
#cursor-scene  { position: fixed; inset: 0; z-index: 40; width: 100%; height: 100%; pointer-events: none; mix-blend-mode: screen; }

/* DEPTH / FLOOR */
.depth-vignette {
  position: fixed; inset: 0; z-index: 9; pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 45%, transparent 0 40%, rgba(1,3,9,0.28) 62%, rgba(0,0,0,0.82) 100%),
    linear-gradient(90deg, rgba(0,0,0,0.5), transparent 14% 86%, rgba(0,0,0,0.42));
  mix-blend-mode: multiply;
}
.circuit-floor {
  position: fixed; left: -8%; right: -8%; bottom: -5%; z-index: 2; height: 42%;
  transform: perspective(520px) rotateX(61deg); transform-origin: bottom; opacity: 0.88;
  background:
    linear-gradient(90deg, transparent 0 9px, rgba(69,230,255,0.35) 10px 11px, transparent 12px 70px),
    linear-gradient(0deg, transparent 0 19px, rgba(69,230,255,0.3) 20px 21px, transparent 22px 86px),
    radial-gradient(circle at 50% 36%, rgba(255,62,221,0.3), transparent 24%),
    linear-gradient(180deg, rgba(8,31,55,0.18), rgba(1,11,22,0.9));
  filter: drop-shadow(0 -18px 36px rgba(43,210,255,0.2));
  mask-image: linear-gradient(180deg, transparent 0, black 24%, black 100%);
}
.circuit-floor::before, .circuit-floor::after {
  content: ''; position: absolute;
  border: 1px solid rgba(89,235,255,0.2);
  box-shadow: 0 0 22px rgba(65,232,255,0.2), inset 0 0 28px rgba(65,232,255,0.12);
}
.circuit-floor::before { inset: 16% 12% auto; height: 24%; }
.circuit-floor::after  { inset: auto 20% 0; height: 38%; border-color: rgba(255,68,221,0.18); }

/* BRAIN */
.brain-stage {
  position: fixed; z-index: 5; left: 50%; top: 50%;
  width: min(82vw, 1080px); aspect-ratio: 1680 / 902;
  --brain-scale: 1; --brain-glow-size: 0px; --brain-glow-alpha: 0;
  --brain-pulse-opacity: 0; --brain-pulse-ring: 1;
  transform: translate(-50%, -42%) scale(var(--brain-scale));
  transform-origin: 50% 54%; pointer-events: none;
  filter: drop-shadow(0 0 40px rgba(63,234,255,0.28)) drop-shadow(0 0 var(--brain-glow-size) rgba(255,72,220,var(--brain-glow-alpha)));
  will-change: transform, filter;
}
.brain-stage::after {
  content: ''; position: absolute; z-index: 3; inset: 2% 3% 5%; border-radius: 50%;
  pointer-events: none; opacity: var(--brain-pulse-opacity);
  transform: scale(var(--brain-pulse-ring)); transform-origin: 50% 52%;
  background: radial-gradient(ellipse at 52% 48%, rgba(225,255,255,0.48) 0, rgba(68,238,255,0.22) 24%, rgba(255,78,220,0.12) 42%, transparent 70%);
  filter: blur(8px); mix-blend-mode: screen; will-change: opacity, transform;
}
.brain-stage::before {
  content: ''; position: absolute; inset: -8% -5%; z-index: 2; pointer-events: none;
  background: radial-gradient(circle at 53.4% 43.6%, rgba(0,10,20,0.52) 0 1.4%, rgba(0,13,25,0.28) 2.8%, rgba(0,14,25,0.1) 4.8%, transparent 8%);
  mix-blend-mode: multiply;
}
.brain-photo {
  position: absolute; z-index: 1; inset: -8% -5%; width: 110%; height: 116%;
  object-fit: cover; object-position: center; opacity: 0.96; mix-blend-mode: screen;
  --brain-saturation: 1.28; --brain-brightness: 1.12;
  filter: saturate(var(--brain-saturation)) contrast(1.18) brightness(var(--brain-brightness));
  will-change: filter;
  -webkit-mask-image:
    radial-gradient(ellipse at 50% 42%, black 0 44%, rgba(0,0,0,0.84) 57%, transparent 79%),
    linear-gradient(180deg, transparent 0, black 14%, black 82%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    radial-gradient(ellipse at 50% 42%, black 0 44%, rgba(0,0,0,0.84) 57%, transparent 79%),
    linear-gradient(180deg, transparent 0, black 14%, black 82%, transparent 100%);
  mask-composite: intersect;
}

/* TOPBAR */
.topbar {
  position: fixed; z-index: 14;
  top: clamp(18px, 3vh, 32px);
  left: clamp(28px, 8vw, 140px); right: clamp(28px, 8vw, 140px);
  display: flex; align-items: center; justify-content: space-between;
  pointer-events: none;
}
.brand, .nav-panel { pointer-events: auto; }
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  filter: drop-shadow(0 0 20px rgba(64,215,255,0.38));
  transition: filter 0.3s ease;
}
.brand:hover { filter: drop-shadow(0 0 32px rgba(64,215,255,0.62)); }

.brand-mark {
  position: relative; display: grid; width: 46px; height: 46px; place-items: center;
}
.brand-mark::before, .brand-mark::after, .brand-mark span {
  content: ''; position: absolute; border-radius: 2px;
  background: linear-gradient(145deg, rgba(153,229,255,0.95), rgba(38,103,176,0.55) 55%, rgba(13,37,76,0.78));
  box-shadow: inset 0 0 10px rgba(255,255,255,0.22), 0 0 20px rgba(71,199,255,0.32);
}
.brand-mark::before { width: 16px; height: 42px; transform: skewX(-25deg) rotate(31deg) translate(-7px, 1px); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
.brand-mark::after  { width: 16px; height: 42px; transform: skewX(25deg) rotate(-31deg) translate(7px, 1px); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
.brand-mark span    { width: 18px; height: 18px; transform: translateY(10px) rotate(45deg); opacity: 0.75; }

.brand-copy { display: grid; gap: 0; line-height: 0.88; text-shadow: 0 0 16px rgba(116,232,255,0.18); }
.brand-copy strong {
  font-family: var(--display-font); font-size: clamp(15px, 1.3vw, 19px);
  font-weight: 700; letter-spacing: 0.08em; color: var(--text);
}
.brand-copy span {
  font-family: var(--display-font); font-size: clamp(9px, 0.8vw, 11px);
  font-weight: 400; letter-spacing: 0.22em; color: var(--cyan-soft);
}

/* NAV */
.nav-panel {
  display: flex; align-items: center; gap: 4px; padding: 6px;
  border: 1px solid rgba(66,234,255,0.18); border-radius: 12px;
  background: rgba(4,11,28,0.72); backdrop-filter: blur(22px);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04) inset, 0 20px 48px rgba(0,0,0,0.42), 0 0 32px rgba(66,234,255,0.08);
}
.nav-panel a {
  position: relative; display: inline-flex; align-items: center;
  padding: 8px 14px; border-radius: 8px;
  color: rgba(220,242,255,0.68);
  font-family: var(--display-font); font-size: clamp(8px, 0.72vw, 10px);
  font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase;
  transition: all 220ms ease; white-space: nowrap;
}
.nav-panel a:hover, .nav-panel .is-active {
  color: rgba(248,253,255,0.98);
  background: rgba(66,234,255,0.1);
  box-shadow: 0 0 0 1px rgba(66,234,255,0.26), 0 0 20px rgba(66,234,255,0.1);
}
.nav-panel .is-active {
  color: var(--cyan);
  background: rgba(66,234,255,0.14);
  box-shadow: 0 0 0 1px rgba(66,234,255,0.4), 0 0 24px rgba(66,234,255,0.14), inset 0 0 14px rgba(66,234,255,0.08);
}

/* HERO */
.hero-copy {
  position: absolute; z-index: 10;
  left: clamp(32px, 7.2vw, 104px); top: clamp(300px, 42vh, 360px);
  width: clamp(320px, 32vw, 470px); color: var(--text); pointer-events: none;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 18px;
  font-family: var(--mono-font); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--cyan-soft);
}
.hero-eyebrow::before { content: ''; display: block; width: 28px; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan)); }
.hero-eyebrow::after  { content: ''; display: block; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); animation: pulse 2s ease infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:0.5;transform:scale(0.7);} }

.hero-copy h1 {
  max-width: 14ch; color: rgba(241,252,255,0.97);
  font-family: var(--display-font); font-size: clamp(27px, 3.5vw, 52px);
  font-weight: 800; line-height: 1.04; letter-spacing: -0.01em;
  text-shadow: 0 0 60px rgba(52,219,255,0.2);
}
.hero-copy h1 em { font-style: normal; color: var(--cyan); text-shadow: 0 0 30px rgba(66,234,255,0.6); }
.hero-copy p {
  max-width: 38em; margin: 18px 0 0; color: var(--text-muted);
  font-size: clamp(13px, 1.02vw, 15.5px); font-weight: 400; line-height: 1.66; letter-spacing: 0.01em;
}
.hero-stats {
  display: flex; flex-wrap: wrap; gap: clamp(20px, 2.4vw, 36px);
  margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(66,234,255,0.16);
}
.hero-stats span { display: grid; gap: 5px; }
.hero-stats b { color: var(--cyan); font-family: var(--display-font); font-size: clamp(18px, 1.5vw, 24px); font-weight: 700; line-height: 1; text-shadow: 0 0 16px rgba(66,234,255,0.5); }
.hero-stats small { color: var(--text-dim); font-family: var(--mono-font); font-size: 9px; text-transform: uppercase; letter-spacing: 0.12em; }

.hero-actions {
  display: flex; gap: 14px; margin-top: 26px; pointer-events: auto;
}
.btn-primary, .btn-ghost {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px;
  border-radius: 8px; font-family: var(--display-font); font-size: 10px;
  font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  cursor: var(--neon-cursor); transition: all 220ms ease;
}
.btn-primary {
  background: linear-gradient(135deg, rgba(66,234,255,0.2), rgba(66,234,255,0.08));
  border: 1px solid rgba(66,234,255,0.5); color: var(--cyan);
}
.btn-primary:hover {
  background: linear-gradient(135deg, rgba(66,234,255,0.3), rgba(66,234,255,0.12));
  box-shadow: 0 0 28px rgba(66,234,255,0.28), 0 0 0 1px rgba(66,234,255,0.6);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent; border: 1px solid rgba(220,240,255,0.2); color: var(--text-muted);
}
.btn-ghost:hover { border-color: rgba(220,240,255,0.4); color: var(--text); transform: translateY(-2px); }

/* SYSTEM COPY */
.system-copy {
  position: absolute; z-index: 10;
  right: clamp(32px, 7.6vw, 116px); top: clamp(156px, 22vh, 210px);
  width: clamp(260px, 24vw, 360px); color: var(--text-muted);
  pointer-events: none; text-align: right;
}
.system-copy p { font-size: clamp(12.5px, 0.96vw, 14.5px); font-weight: 400; line-height: 1.68; letter-spacing: 0.01em; }
.signal-list { display: grid; gap: 10px; margin-top: 20px; }
.signal-list span {
  display: flex; align-items: center; justify-content: flex-end; gap: 8px;
  font-family: var(--mono-font); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
}
.signal-list span::after {
  content: ''; display: block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 2.4s ease infinite;
}
.signal-list span:nth-child(1) { color: var(--cyan-soft); }
.signal-list span:nth-child(2) { color: var(--magenta-soft); }
.signal-list span:nth-child(2)::after { background: var(--magenta); box-shadow: 0 0 10px var(--magenta); animation-delay: 0.8s; }
.signal-list span:nth-child(3) { color: rgba(227,255,255,0.62); }
.signal-list span:nth-child(3)::after { animation-delay: 1.6s; }

/* HUD PANELS - hidden */
.hud-panel { display: none !important; }

/* PAGE COPY (SUBPAGES) */
.page-copy, .page-rhythm, .page-map { position: absolute; z-index: 11; color: var(--text); pointer-events: none; }
.page-copy {
  left: clamp(34px, 6.4vw, 96px); top: clamp(180px, 30vh, 270px);
  width: clamp(320px, 30vw, 470px);
}
.page-eyebrow {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 16px;
  font-family: var(--mono-font); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--cyan-soft);
}
.page-eyebrow::before { content: ''; display: block; width: 22px; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan)); }

.page-copy h1 {
  max-width: 14ch; color: rgba(242,253,255,0.97);
  font-family: var(--display-font); font-size: clamp(38px, 4.8vw, 72px);
  font-weight: 800; line-height: 0.92; letter-spacing: -0.02em;
  text-shadow: 0 0 50px rgba(66,234,255,0.2);
}
.page-copy p { max-width: 38em; margin: 18px 0 0; color: var(--text-muted); font-size: clamp(13px, 0.98vw, 15px); font-weight: 400; line-height: 1.66; letter-spacing: 0.01em; }

.page-metrics {
  display: flex; flex-wrap: wrap; gap: clamp(16px, 2.2vw, 30px);
  margin-top: 28px; padding-top: 22px; border-top: 1px solid rgba(73,233,255,0.18);
}
.page-metrics span { display: grid; gap: 5px; min-width: 60px; }
.page-metrics b { color: var(--cyan); font-family: var(--display-font); font-size: clamp(16px, 1.3vw, 22px); font-weight: 700; line-height: 1; text-shadow: 0 0 14px rgba(66,234,255,0.5); }
.page-metrics small { color: var(--text-dim); font-family: var(--mono-font); font-size: 9px; line-height: 1.35; text-transform: uppercase; letter-spacing: 0.12em; }

.page-rhythm {
  right: clamp(32px, 8vw, 120px); top: clamp(165px, 23vh, 225px);
  width: clamp(280px, 26vw, 390px); color: var(--text-muted); text-align: right;
}
.page-rhythm p { font-size: clamp(12.5px, 0.96vw, 14.5px); font-weight: 400; line-height: 1.7; letter-spacing: 0.01em; }
.page-rhythm ul { display: grid; gap: 10px; margin: 20px 0 0; padding: 0; list-style: none; }
.page-rhythm li {
  display: flex; align-items: center; justify-content: flex-end; gap: 8px;
  font-family: var(--mono-font); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
}
.page-rhythm li::after { content: ''; display: block; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan-soft); box-shadow: 0 0 8px var(--cyan); }
.page-rhythm li:nth-child(2n) { color: var(--magenta-soft); }
.page-rhythm li:nth-child(2n)::after { background: var(--magenta-soft); box-shadow: 0 0 8px var(--magenta); }
.page-rhythm li:nth-child(3n) { color: rgba(227,255,255,0.6); }

.page-map {
  z-index: 10; left: clamp(42px, 7vw, 118px); right: clamp(42px, 7vw, 118px);
  top: calc(100vh - clamp(132px, 15vh, 168px)); bottom: auto;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 32px);
  transform: perspective(720px) rotateX(14deg); transform-origin: center bottom;
}
.route-node { position: relative; padding: 16px 0 0; border-top: 1px solid rgba(66,234,255,0.26); color: var(--text-muted); }
.route-node::before {
  content: ''; position: absolute; left: 0; top: -1px; width: 45%; height: 1px;
  background: linear-gradient(90deg, rgba(67,232,255,0.98), rgba(255,78,220,0.4), transparent);
  box-shadow: 0 0 16px rgba(67,232,255,0.48); animation: nodeSweep 7s ease-in-out infinite;
}
.route-node::after {
  content: ''; position: absolute; right: 0; top: -5px;
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,84,224,0.8); box-shadow: 0 0 20px rgba(255,78,220,0.64);
}
.route-node b { display: block; color: rgba(241,253,255,0.94); font-family: var(--display-font); font-size: clamp(11px, 0.9vw, 14px); font-weight: 600; letter-spacing: 0.04em; line-height: 1.2; }
.route-node span { display: block; margin-top: 8px; color: var(--cyan-soft); font-family: var(--mono-font); font-size: 9px; line-height: 1.45; text-transform: uppercase; letter-spacing: 0.1em; }

/* FLOW EXTENSION */
.flow-extension {
  position: relative; z-index: 10;
  margin: 0;
  padding: clamp(48px, 7vh, 80px) clamp(32px, 7vw, 118px) clamp(90px, 14vh, 140px);
  color: var(--text); pointer-events: none;
}
.flow-extension::before {
  content: ''; position: absolute; left: -10vw; right: -10vw; top: -8vh; bottom: 0; z-index: -2;
  background:
    radial-gradient(ellipse at 50% 4%, rgba(67,232,255,0.14), transparent 20%),
    radial-gradient(ellipse at 74% 38%, rgba(255,70,215,0.1), transparent 28%),
    linear-gradient(180deg, rgba(0,5,13,0), rgba(2,10,22,0.8) 24%, rgba(1,5,12,0.9));
}
.flow-extension::after {
  content: ''; position: absolute; left: -10vw; right: -10vw; top: 4vh; height: 112vh; z-index: -1;
  opacity: 0.8; transform: perspective(620px) rotateX(61deg); transform-origin: center top;
  background:
    linear-gradient(90deg, transparent 0 42px, rgba(66,234,255,0.18) 43px 44px, transparent 45px 128px),
    linear-gradient(0deg, transparent 0 34px, rgba(66,234,255,0.14) 35px 36px, transparent 37px 116px),
    radial-gradient(ellipse at 52% 12%, rgba(255,70,215,0.2), transparent 22%);
  filter: drop-shadow(0 -18px 38px rgba(66,234,255,0.16));
  mask-image: linear-gradient(180deg, transparent 0, black 16%, black 86%, transparent 100%);
}

.flow-head {
  display: grid; grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1fr);
  align-items: end; gap: clamp(36px, 8vw, 120px); max-width: 1320px;
}
.flow-head h2 {
  max-width: 12ch; color: rgba(241,252,255,0.96);
  font-family: var(--display-font); font-size: clamp(24px, 2.6vw, 42px);
  font-weight: 700; line-height: 0.98; letter-spacing: -0.01em;
  text-shadow: 0 0 24px rgba(66,234,255,0.24);
}
.flow-head p { max-width: 52em; color: var(--text-muted); font-size: clamp(13px, 0.96vw, 15px); font-weight: 400; line-height: 1.68; letter-spacing: 0.01em; }

.flow-lanes {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2.5vw, 44px); margin-top: clamp(52px, 9vh, 92px); max-width: 1400px;
  transform: perspective(900px) rotateX(6deg); transform-origin: center top;
}
.flow-lane {
  position: relative; min-height: 160px; padding: 20px 0 0;
  border-top: 1px solid rgba(66,234,255,0.28); color: var(--text-muted);
  transition: border-color 300ms ease;
}
.flow-lane:hover { border-top-color: rgba(66,234,255,0.6); }
.flow-lane::before {
  content: ''; position: absolute; left: 0; top: -1px; width: 54%; height: 1px;
  background: linear-gradient(90deg, rgba(66,234,255,0), rgba(66,234,255,0.9), rgba(255,70,215,0.4), transparent);
  box-shadow: 0 0 18px rgba(66,234,255,0.52); animation: flowLane 9s ease-in-out infinite;
}
.flow-lane::after {
  content: ''; position: absolute; left: min(72%, 260px); top: -1px;
  width: 1px; height: calc(80px + var(--lane-drop, 0px));
  background: linear-gradient(180deg, rgba(66,234,255,0.7), rgba(255,70,215,0.24), transparent);
  box-shadow: 0 0 16px rgba(66,234,255,0.3);
}
.flow-lane b { display: block; color: rgba(242,253,255,0.92); font-family: var(--display-font); font-size: clamp(12px, 0.96vw, 15px); font-weight: 600; letter-spacing: 0.04em; line-height: 1.2; }
.flow-lane span { display: block; margin-top: 10px; color: var(--cyan-soft); font-family: var(--mono-font); font-size: 10px; line-height: 1.4; text-transform: uppercase; letter-spacing: 0.1em; }
.flow-lane p { margin: 16px 0 0; color: rgba(218,244,252,0.56); font-size: clamp(12px, 0.88vw, 14px); font-weight: 400; line-height: 1.62; }
.flow-lane:nth-child(2n)::before {
  background: linear-gradient(90deg, rgba(255,70,215,0), rgba(255,70,215,0.7), rgba(66,234,255,0.4), transparent);
  box-shadow: 0 0 18px rgba(255,70,215,0.38); animation-delay: -2.6s;
}
.flow-lane:nth-child(3n) { --lane-drop: 42px; }
.flow-lane:nth-child(4n) { --lane-drop: 76px; }

/* CONTACT */
.contact-section {
  position: relative; z-index: 11; pointer-events: auto;
  padding: clamp(40px, 6vh, 72px) clamp(32px, 7vw, 118px) clamp(80px, 12vh, 120px);
}
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 100px); align-items: start; max-width: 1200px;
}
.contact-info h2 {
  color: rgba(241,252,255,0.96); font-family: var(--display-font);
  font-size: clamp(22px, 2.2vw, 36px); font-weight: 700; line-height: 1.02;
  letter-spacing: -0.01em; text-shadow: 0 0 24px rgba(66,234,255,0.22); margin-bottom: 16px;
}
.contact-info p { color: var(--text-muted); font-size: clamp(13px, 0.96vw, 15px); line-height: 1.68; margin-bottom: 32px; }
.contact-details { display: grid; gap: 16px; }
.contact-item {
  display: flex; align-items: flex-start; gap: 14px; padding: 16px 20px;
  border: 1px solid rgba(66,234,255,0.16); border-radius: 10px;
  background: rgba(8,18,38,0.72); backdrop-filter: blur(12px);
  transition: border-color 240ms ease;
}
.contact-item:hover { border-color: rgba(66,234,255,0.32); }
.contact-item-icon {
  width: 38px; height: 38px; display: grid; place-items: center; border-radius: 8px;
  background: rgba(66,234,255,0.1); border: 1px solid rgba(66,234,255,0.22);
  flex-shrink: 0; font-size: 17px;
}
.contact-item-text b {
  display: block; color: rgba(241,252,255,0.9); font-family: var(--display-font);
  font-size: 10px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 4px;
}
.contact-item-text span { color: var(--cyan-soft); font-family: var(--mono-font); font-size: 12px; }

.contact-form {
  padding: 32px; border: 1px solid rgba(66,234,255,0.18); border-radius: 14px;
  background: rgba(8,18,38,0.72); backdrop-filter: blur(20px);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04) inset, 0 24px 60px rgba(0,0,0,0.4), 0 0 40px rgba(66,234,255,0.06);
}
.form-row { display: grid; gap: 16px; margin-bottom: 16px; }
.form-row.two-col { grid-template-columns: 1fr 1fr; }
.form-group { display: grid; gap: 8px; }
.form-group label { font-family: var(--mono-font); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-muted); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px;
  border: 1px solid rgba(66,234,255,0.18); border-radius: 8px;
  background: rgba(4,12,28,0.72); color: var(--text);
  font-family: var(--ui-font); font-size: 15px; font-weight: 500;
  outline: none; cursor: var(--neon-cursor);
  transition: border-color 220ms ease, box-shadow 220ms ease; appearance: none;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dim); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: rgba(66,234,255,0.5);
  box-shadow: 0 0 0 3px rgba(66,234,255,0.1), 0 0 20px rgba(66,234,255,0.08);
}
.form-group textarea { min-height: 120px; resize: vertical; line-height: 1.6; }
.form-submit {
  width: 100%; margin-top: 8px; padding: 14px 28px;
  border: 1px solid rgba(66,234,255,0.46); border-radius: 8px;
  background: linear-gradient(135deg, rgba(66,234,255,0.18), rgba(255,70,215,0.08));
  color: var(--cyan); font-family: var(--display-font); font-size: 11px;
  font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  cursor: var(--neon-cursor); transition: all 240ms ease;
}
.form-submit:hover {
  box-shadow: 0 0 32px rgba(66,234,255,0.24), 0 0 0 1px rgba(66,234,255,0.6);
  transform: translateY(-2px);
}
.form-submit:active { transform: translateY(0); }

/* SCROLL SECTION — starts after 100vh viewport */
.scroll-section {
  position: relative; z-index: 10;
  margin-top: 100vh;
  padding-top: clamp(48px, 7vh, 80px);
}

/* FEATURE CARDS */
.feature-cards {
  position: relative; z-index: 11; pointer-events: none;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
  padding: 0 clamp(32px, 7vw, 118px);
}
.feature-card {
  padding: 28px 26px 26px; border: 1px solid rgba(66,234,255,0.14); border-radius: 16px;
  background: linear-gradient(145deg, rgba(10,26,54,0.9), rgba(4,12,28,0.78));
  backdrop-filter: blur(20px) saturate(1.2);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.05) inset,
    0 2px 4px rgba(0,0,0,0.4),
    0 16px 48px rgba(0,0,0,0.5),
    0 0 0 0 rgba(66,234,255,0.12);
  transition: border-color 300ms ease, box-shadow 300ms ease, transform 300ms ease;
  cursor: default;
}
.feature-card:hover {
  border-color: rgba(66,234,255,0.35);
  transform: translateY(-4px);
  box-shadow: 0 0 0 1px rgba(66,234,255,0.22) inset,
    0 8px 24px rgba(0,0,0,0.5),
    0 24px 64px rgba(0,0,0,0.4),
    0 0 40px rgba(66,234,255,0.12);
}
.feature-card-icon {
  width: 46px; height: 46px; display: grid; place-items: center; border-radius: 10px;
  background: linear-gradient(135deg, rgba(66,234,255,0.14), rgba(66,234,255,0.06));
  border: 1px solid rgba(66,234,255,0.24);
  margin-bottom: 20px; font-size: 20px;
  box-shadow: 0 0 20px rgba(66,234,255,0.1), inset 0 1px 0 rgba(255,255,255,0.08);
}
.feature-card h3 {
  color: rgba(241,252,255,0.96); font-family: var(--display-font); font-size: clamp(11px, 0.92vw, 14px);
  font-weight: 600; letter-spacing: 0.05em; line-height: 1.25; margin-bottom: 10px;
}
.feature-card p { color: var(--text-muted); font-size: clamp(12px, 0.84vw, 13px); font-weight: 400; line-height: 1.68; }
.feature-card-tag {
  display: inline-flex; margin-top: 18px; padding: 5px 11px; border-radius: 4px;
  background: rgba(66,234,255,0.07); border: 1px solid rgba(66,234,255,0.18);
  color: rgba(66,234,255,0.72); font-family: var(--mono-font); font-size: 9px; letter-spacing: 0.14em; text-transform: uppercase;
}

/* SUBPAGE */
.subpage-shell {
  background:
    radial-gradient(ellipse at 50% 35%, rgba(13,58,120,0.48), transparent 34%),
    radial-gradient(ellipse at 14% 10%, rgba(52,207,255,0.14), transparent 20%),
    radial-gradient(ellipse at 86% 64%, rgba(255,48,221,0.12), transparent 26%),
    linear-gradient(180deg, #030714 0%, #030714 43%, #020916 100%);
}
.page-depth-pattern {
  position: fixed; left: -8%; right: -8%; bottom: -3%; z-index: 8; height: 36%;
  pointer-events: none; opacity: 0.78;
  transform: perspective(560px) rotateX(63deg); transform-origin: center bottom;
  filter: drop-shadow(0 -14px 28px rgba(54,218,255,0.18));
  mask-image: linear-gradient(180deg, transparent 0, black 24%, black 100%);
}
.page-depth-pattern::before {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, transparent 0 34px, rgba(70,232,255,0.18) 35px 36px, transparent 37px 112px),
    linear-gradient(0deg, transparent 0 29px, rgba(70,232,255,0.16) 30px 31px, transparent 32px 108px),
    radial-gradient(ellipse at 50% 88%, rgba(255,70,215,0.2), transparent 30%);
}
.page-depth-pattern span {
  position: absolute; height: 1px; border-radius: 99px;
  background: linear-gradient(90deg, transparent, rgba(66,234,255,0.84), rgba(66,234,255,0.1));
  box-shadow: 0 0 14px rgba(66,234,255,0.36); animation: floorCurrent 8s ease-in-out infinite;
}
.page-depth-pattern span::before { content: ''; position: absolute; right: 0; top: 0; width: 1px; height: var(--drop, 26px); background: linear-gradient(180deg, rgba(66,234,255,0.66), transparent); }
.page-depth-pattern span::after { content: ''; position: absolute; right: -2px; top: calc(var(--drop, 26px) - 2px); width: 5px; height: 5px; border-radius: 50%; background: rgba(255,84,224,0.66); box-shadow: 0 0 18px rgba(255,78,220,0.52); }
.page-depth-pattern span:nth-child(1) { left: 7%; top: 21%; width: 22%; --drop: 34px; }
.page-depth-pattern span:nth-child(2) { left: 23%; top: 35%; width: 19%; --drop: 48px; animation-delay: -2s; }
.page-depth-pattern span:nth-child(3) { left: 41%; top: 16%; width: 14%; --drop: 56px; animation-delay: -4.4s; }
.page-depth-pattern span:nth-child(4) { left: 53%; top: 31%; width: 24%; --drop: 42px; animation-delay: -1.2s; }
.page-depth-pattern span:nth-child(5) { left: 68%; top: 48%; width: 18%; --drop: 36px; animation-delay: -3.5s; }
.page-depth-pattern span:nth-child(6) { left: 11%; top: 62%; width: 32%; --drop: 28px; animation-delay: -5s; }
.page-depth-pattern span:nth-child(7) { left: 47%; top: 67%; width: 28%; --drop: 46px; animation-delay: -2.8s; }
.page-depth-pattern span:nth-child(8) { left: 75%; top: 18%; width: 16%; --drop: 58px; animation-delay: -6.1s; }
.page-depth-pattern span:nth-child(3n) { background: linear-gradient(90deg, transparent, rgba(255,76,220,0.62), rgba(66,234,255,0.1)); }

/* DATA STREAMS */
.data-streams { position: absolute; inset: 0; z-index: 6; pointer-events: none; overflow: visible; display: none; }
.data-streams path { fill: none; stroke: rgba(94,242,255,0.44); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 0.1 18 7 54 2 88; animation: streamFlow 3.2s linear infinite; vector-effect: non-scaling-stroke; }
.data-streams path:nth-child(3n) { stroke: rgba(255,76,220,0.54); stroke-dasharray: 0.1 22 11 68 2 96; animation-duration: 4.1s; }
.data-streams path:nth-child(4n) { stroke-width: 2; stroke-dasharray: 0.1 16 18 88; animation-duration: 2.7s; }
.data-streams path:nth-child(5n) { stroke: rgba(195,252,255,0.48); stroke-width: 0.9; stroke-dasharray: 0.1 11 4 38; animation-duration: 2.25s; }

/* SECTION DIVIDER */
.section-divider {
  position: relative; z-index: 11;
  display: flex; align-items: center; gap: 20px;
  padding: clamp(36px, 5vh, 56px) clamp(32px, 7vw, 118px);
  pointer-events: none;
}
.section-divider::before, .section-divider::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(66,234,255,0.2), transparent);
}
.section-divider span {
  font-family: var(--mono-font); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase;
  color: rgba(66,234,255,0.42); white-space: nowrap;
}

/* SCROLL HINT */
.scroll-hint {
  position: absolute; z-index: 12;
  bottom: clamp(28px, 4vh, 44px); left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  pointer-events: none; opacity: 0.6;
  animation: scrollBounce 2.5s ease-in-out infinite;
}
.scroll-hint span {
  font-family: var(--mono-font); font-size: 9px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--cyan-soft);
}
.scroll-hint svg { width: 18px; height: 18px; stroke: var(--cyan); fill: none; stroke-width: 1.5; stroke-linecap: round; }
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(5px); }
}
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }
.reveal-delay-4 { transition-delay: 0.48s; }

/* SPECIAL */
.subpage-shell[data-page="matematik"] .page-copy h1 { max-width: 9ch; }
.subpage-shell[data-page="iletisim"] .page-map { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* KEYFRAMES */
@keyframes streamFlow   { to { stroke-dashoffset: -220; } }
@keyframes flowLane     { 0%,100%{opacity:0.32;transform:translateX(0);} 52%{opacity:0.9;transform:translateX(38%);} }
@keyframes nodeSweep    { 0%,100%{opacity:0.28;transform:translateX(0);} 46%{opacity:0.88;transform:translateX(74%);} }
@keyframes floorCurrent { 0%,100%{opacity:0.42;transform:translateX(0);} 45%{opacity:0.9;transform:translateX(18px);} }
@keyframes scanBar      { 0%,100%{transform:translateX(-100%);opacity:0.12;} 42%,58%{opacity:0.88;} 100%{transform:translateX(100%);} }

/* RESPONSIVE */
@media (max-width: 900px) {
  .site-shell::before { height: 178px; background: linear-gradient(180deg, rgba(1,4,12,1), rgba(2,7,18,0.96) 62%, rgba(2,7,18,0)); }
  html, body { overflow: auto; }
  .site-shell { min-height: 2200px; }
  .topbar { left: 18px; right: 18px; flex-direction: column; align-items: center; gap: 16px; top: 14px; }
  .nav-panel { gap: 2px; padding: 4px; }
  .nav-panel a { padding: 7px 10px; font-size: 8px; }
  .hero-copy { left: 24px; top: 420px; width: min(440px, calc(100vw - 48px)); }
  .system-copy { right: 24px; top: 680px; width: min(420px, calc(100vw - 48px)); text-align: left; }
  .signal-list span { justify-content: flex-start; }
  .signal-list span::after { order: -1; }
  .subpage-shell { min-height: 2600px; }
  .page-copy { left: 24px; top: 360px; width: min(440px, calc(100vw - 48px)); }
  .page-copy h1 { max-width: 11ch; font-size: clamp(40px, 10vw, 58px); }
  .page-rhythm { left: 24px; right: auto; top: 660px; width: min(440px, calc(100vw - 48px)); text-align: left; }
  .page-rhythm li { justify-content: flex-start; }
  .page-rhythm li::after { order: -1; }
  .page-map { left: 24px; right: 24px; top: 820px; grid-template-columns: repeat(2, 1fr); gap: 18px 24px; transform: none; }
  .scroll-section { padding-top: 40px; }
  .feature-cards { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 0 24px; }
  .section-divider { padding-left: 24px; padding-right: 24px; }
  .flow-extension { padding: 48px 24px 60px; }
  .flow-head { grid-template-columns: 1fr; gap: 18px; }
  .flow-lanes { grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 44px; transform: none; }
  .contact-section { padding-left: 24px; padding-right: 24px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 620px) {
  .site-shell { min-height: 2500px; }
  .hero-copy { top: 450px; }
  .hero-copy p { font-size: 12.5px; }
  .hero-actions { flex-direction: column; }
  .brain-stage { width: 112vw; transform: translate(-50%, -38%) scale(var(--brain-scale)); }
  .subpage-shell { min-height: 2900px; }
  .page-copy { top: 420px; }
  .page-rhythm { top: 710px; }
  .page-map, .subpage-shell[data-page="iletisim"] .page-map { top: 860px; grid-template-columns: 1fr; }
  .feature-cards { grid-template-columns: 1fr; padding: 0 18px; }
  .flow-lanes { grid-template-columns: 1fr; }
  .form-row.two-col { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}


/* Security-safe contact form state: avoids inline style attributes in HTML. */
.form-success {
  text-align: center;
  padding: 24px;
  color: #42eaff;
  font-family: 'Share Tech Mono', monospace;
  font-size: 13px;
}
.form-success[hidden] {
  display: none !important;
}